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(NoMoael.) l I y G. A'. GROVER 8a E. E. WORDEN;

ELBVATOR LOCK.v

No. 287,668'. I Patented Oct. 30, 188,3'.

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UNITED STATES c PATENT OEIIICE.l Q

GEOEGE A. GE'ovEE, OE BOSTON, AND EDWIN E. WORDEN, OE sOMEEvILLE7 MASSACHUSETTS.

ELEVATO R-LOCK.

SPECIFICATION forming part of Letters Patent No. 287,668, dated October 30,1883.

, Application filed September 17, 1883. (No model.)

To all whom, t may concern,.-

Be it known thatwe, GEORGE A. GROVER, of Boston, countyA of Suffolk, and EDWIN E. WORDEN, of Somerville, county of Middlesex, both of theState of Massachusetts, have invented an Improvement in Elevator-Locks, of which the following description, in connection with the accompanying drawings, is a specification, like letters ony the drawings representing like parts.

Our invention relates to alocking device for the shipper rope or chain of elevators, and has for its object to prevent accidents arising from the moving of the elevator at improper times.

In elevators as usually constructed for the conveyance of merchandise the shipper is generally accessible from all thelandings, as well as from the car itself, and it frequentlyhappens that a person at onelanding sets the oar in movement while it is in use at anotherlanding, sometimes causing serious accidents.

The invention consists` in a locking device attached to and traveling with the car, by means of which the attendant can securely fasten the shipper-rope, and consequently pre.- vent thc movement of the car by persons at other landings. The locking device consists essentially, of a pair of jaws and mechanism to operate them, the said jaws, when open or separated, forming a guide for the shipper-rope, which then passes freely -between them, the openingbeing sufficiently large to permit the usual bulbs or handle enlargements to pass through.

The invention also consists in details of construction of thelocking device.

Figure l is a front elevation of alocking device embodying this invention; Fig. 2, an elevation with one of the plates forming the casing or frame-work of4 the locking`V device removed; Fig. 3, an elevation of the part removed in Fig. 2; Fig. 4, a plan view of the locking device, and Fig. 5 a rear end View of the movable jaw. Y

' The operating mechanism of the locking deviceis contained in a stout frame or case, c a', adapted to be securely fastened to some part ofthe frame-work ofthe elevator-car, in proper position with relation to the shipper-rope, a portion of which is shown at b, Fig. l. rlhe said casing has connected withit, at its forward end, an open frame, c, constituting the fixed jaw of the rope-grippingjaws, and also forming a guide for the said rope in the movement of the car relative thereto. The movable jaw d is provided with a rectangular frame, d', which slides longitudinally in a suitableguide or mortise in the plates c c. The movable jaw d is operated by a spindle, e, provided with suitable cross-pieceor handle, fffor rotating it, the said spindle being loosely fitted in a transverse passage of a shaft, z', that is free to rotate in the portion d of the movable jaw.

The spindle e has fixed upon it a tongue, om

which, by its engagementrwith abutments n o onthe plate c asthe said spindle is rotatedby the handle f, causes the said jaw d to move toward and from the jaws v c.

The spindle e travels with the said jaw through a slot, p, in

the'plate a, and the said-slot is inclined, as shown atp', in the part through which the spindle -e passes when the jaw d has arrived near the jaw c and begins to press on the rope b.

By means ofthe tongue mthe j aw d can, by the rotation of the spindle e on its axis, pro

duce considerable movement of the j aw d, separating lit from the jaw c, as shown in Fig. 4, a suficientdistance to permit the usual bulbs or enlargements, b', (see Fig. 1,) on theshipper-rope b to pass through, and by the angular movement of the spindle e in the portion p of the Slot thev jaw d is moved forward by a powerful wedge-like action, it firmly gripping the rope b.

The plate a is provided with internal projections, r s, which serve partly as a stop to limit the forward movement of the jaw d and partly as guides for the rOck-shaftz' in the said movement. When the shipper-ropehas no enlargements upon it, the j aw d will only require a slight movement, which can be obtained by the angular movement OI" the spindle e in the inclined slotp, and in this case the tongue m and co-operating projections n oY may be omitted.

The locking device traveling with the car may be employed to grip the shipper-rope b by merely manipulating the handle f to thus stop the car, after whichthe shipper-ropemay remain locked as long as it is desired to have the car remain stationary.

XVhen it is no longer desired to retain the car at avgiven landing, the shipper-rope may be released, so that it can be operated from any other landing in the usual manner.

\Ve claim-d 1. rlhe combination ofthe fixed jaw with the movable jaw and its actuating mechanism, constituting a locking device for the shipper-rope of an elevator, substantially as described.

2. rlhe easing, and j aw fixed thereon, adapted to inclose and form a guide for the shipperrope, combined with the movable jaw and its actuatingspindle, passing through an inclined slot in the said easing, substantially as and for the purpose described.

3. The easing having an internal guide or lnortise and internal projections or abutments, combined with the fixed and mov able jaws, and the actuating spindle and tongue adapted to engage the said abutments to operate the said jaw, substantially as described.

4. The casing and fixed and movable jaws, combined with the shaft pivoted on the said movable jaw, and the spindle and tongue, substantially as described.

5. The casing, and jaw fixed thereon, made as a frame to inelose and guide the shipperrope, combined with the movable jaw and its actuating mechanism, substantially as described.

In testimony whereof we have signed our names to this speeication in the presence of two subscribing witnesses.

GEORGE A. GROVER. EDWD.T E. WORDEN. Vitnesses:

J os. P. LIVERMORE, W. H. SIGs'roN. 

